int ManaCost::pay(ManaCost * _cost)
{
int result = MANA_PAID;
ManaCost * toPay = NEW ManaCost();
toPay->copy(_cost);
ManaCost * diff = Diff(toPay);
for (int i = 0; i < Constants::NB_Colors; i++)
{
cost[i] = diff->getCost(i);
}
delete diff;
delete toPay;
return result;
//TODO return 0 if can't afford the cost!
}
